Which one of the following compounds has the worst solubility in water?MethanolFormic acidCarbon tetrachlorideTable saltCopper sulfate
Question
Which one of the following compounds has the worst solubility in water?
- Methanol
- Formic acid
- Carbon tetrachloride
- Table salt
- Copper sulfate
Solution
The solubility of a compound in water depends on its polarity. Water is a polar solvent and "like dissolves like", meaning polar compounds will dissolve in polar solvents and nonpolar compounds will dissolve in nonpolar solvents.
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Methanol (CH3OH) is a polar molecule and is highly soluble in water due to its ability to form hydrogen bonds with water.
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Formic acid (HCOOH) is also a polar molecule and can form hydrogen bonds with water, making it highly soluble.
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Carbon tetrachloride (CCl4) is a nonpolar molecule. It does not have the ability to form hydrogen bonds with water, making it poorly soluble in water.
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Table salt (NaCl) is an ionic compound and is highly soluble in water. The positive and negative ions in NaCl are attracted to the polar water molecules, causing it to dissolve.
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Copper sulfate (CuSO4) is also an ionic compound and is highly soluble in water.
Therefore, out of the given options, carbon tetrachloride has the worst solubility in water.
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